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G. DUNCAN.

BRAKE POR CABLE RAILWAY GARS.

No.y 295,238'.

Patented Mar. 18, 1884.l

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UNITED STATES PATENT riucn.

GEORGE DUNCAN, OF DUNDIN, OTAGO, NEW ZEALAND.

BRAKE FOR CABLE-RAILWAY CARS.

SPECIFICATION forming part of Letters Patent No. 295,238, dated March' 18, 1884.

` Application niet Decemberaz, 1883. (Normaal.)

' encountered in a climate where snow and ice accumulate on the rails, preventing frictional contact between the rails and the wheels of the the tube, in which an endless cable is used for propelling the cars, and the invention is illustrated in the accompanying drawings, in which* y Figure l is a longitudinal sectional elevation of a cable-railway tube, H, with its slotirons G, and car A, having a wedge, B, guided in a suitable frame, C, projecting downwardly from the car, so that the wedge shall be supported near the slot-irons when in action, and which allows of a vertical movement of the wedge to any desired degree by means of the hand-wheel E and screw D, which are supported by the vstand F, having a nut at the top, through which the screw D passes, the screw being attached to the upper part of the wedge by a joint, which allows a free rotation of the.

screw. Fig. 2 is a cross-section oi' the tube II and car A, the letters in the two figures indicating like parts.

The wedge B in this case, with its guide and 4e mechanism for operating, is shown in the cen` ter of the car; but it is obvious that it may-be placed at any other point on the car inline with the slot that may be desired or that conditions may require; and it may be operated loya lever instead of a screw, but I prefer a screw, as the adjustment of the wedge in the slot when acting as a brake may be made with greater nicety.

The operation is simple and as follows: IV'hen it is desired to stop the car or partially arrest its motion, the hand-wheel E is revolved, which carries the screw D downward, and with it the wedge B, which, entering the slot, is forced into contact withthe irons G of the slot, 4and the resultant friction arrests the motion ofthe car to any degree required.

The angle of the wedge is made to suit the car, the grade ofthe road,- and other requirev ments.l

W'hat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of the wedge B, guide C, screw D, hand-wheel E, and. stand F, with the Vear A and the slot-irons G of an underground slotted-tube endlesscable railway, substantially as shown and described.

2. The combination of the wedge B, guide C, stand F, screw D, and hand-wheel E, with the car A.

3. The wedge B and guide C, iu combination with the car A and slot-irons G.

4. In an endless-cable underground slottedtube railway, the combination of a car, A, a wedge, B, and the slot-irons G of the tube, substantially as shown and described, and for the purpose set forth.

GEORGE DUNCAN.

Vitnesses:

W. NV. Hanscom, P. H. CAMPBELL. 

